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31 systems engineer principal jobs found

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SAIC
Sep 02, 2026
Principal Nuclear Detection Systems Engineer
SAIC CA
Description Make a difference for national security by joining a team of dedicated professionals in El Segundo, CA who assist the US Space Force in developing and deploying the satellites and ground systems for Nuclear Detection System (NDS) capabilities. These systems provide timely and critical nuclear detection data to our warfighter to ensure national security mission success. Our Systems Engineering & Integration (SE&I) team has an immediate need for a hybrid Principal Nuclear Detection System Engineer (USNDS) in El Segundo, CA with mission experience in space/ground systems for the management, development, and deployment of NDS systems to ensure on-time delivery of capabilities. As a SE&I professional, candidates will provide System Engineering (SE) services across all SE disciplines with emphasis in integration and test toward delivering operational capabilities into an enterprise system architecture. Job Responsibilities: Provide Systems...
SAIC
Aug 26, 2026
Principal Systems Engineer
SAIC CO
Description SAIC is seeking a Principal Systems Engineer onsite in Colorado Springs, CO with experience in space operations, space system sustainment or space acquisitions to join the Positioning, Navigation, and Timing (PNT) Systems Engineering & Integration (SE&I) Team. PNT SE&I provides engineering, integration, technical analysis, and subject matter expertise (SME) support to the US Space Force. As a member of our PNT SE&I Team, you'll work in a fast-paced environment with Government personnel and systems engineers to provide systems engineering and analysis services to include system development, enterprise and system architecture, acquisition, testing, operations, and sustainment support for existing and new capabilities. You will also provide an enterprise perspective for identification and review of risks and risk mitigation plans and work to institutionalize systems engineering best practices across the organization. Major duties of this...
General Dynamics Mission Systems, Inc
Mar 27, 2026
Senior Principal Systems Engineer
General Dynamics Mission Systems, Inc MD
Basic Qualifications Requires a Bachelor’s degree in Systems Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 10+ years of job-related experience, or a Master's degree plus 8 years of job-related experience. Agile experience preferred.     CLEARANCE REQUIREMENTS: Ability to obtain a Department of Defense Secret security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position ROLE AND POSITION OBJECTIVES: As a Systems Engineer, you will work alongside a team of highly talented hardware and software engineers to build new technologies to counter threats of tampering, reverse engineering, and supply chain exploits....
SAIC
Jul 29, 2026
Senior Principal Systems Engineer
SAIC
Description SAIC is seeking a qualified Command, Control, Communications, Computers/Information Technology (C4/IT) Engineer to join our team and provide critical support to Marine Corps Installation Command (MCICOM) Defense Policy Initiative (DPRI) Pacific Posture Military Construction (MILCON) efforts in Guam, Tinian, and Darwin. The ideal candidate will bring extensive, recent experience in providing technical support to project teams and ensuring planning and design efforts meet U.S. Marine Corps (USMC) C4/IT mission capability requirements for each facility within the MCICOM-DPRI framework and/or Naval Information Warfare Center (NIWC) Pacific (PAC) Code-H operations. *THIS IS A FULLY REMOTE ROLE BUT MUST BE LOCAL TO GUAM* The responsibilities for this position include serving as a technical representative and subject matter expert (SME) by providing on-site assessments and answers to Requests for Information; reviewing and commenting on various MILCON C4/IT...
SAIC
Sep 16, 2026
Principal Cyber Engineer
SAIC CA
Description SAIC is seeking a Principal Cybersecurity Engineer to support critical Navy communication systems within the DoD. This role is ideal for a hands-on security professional with deep engineering expertise, offensive security experience, and a proven track record finding vulnerabilities, and securing classified and high-security environments. You will serve as a key technical expert collaborating with engineers, program managers, and government personnel to deliver secure, resilient strategic systems. This role is fully ON-SITE in San Diego, CA. Must be local to area. Up to 10% travel involved. JOB DUTIES: Plan and execute penetration test exercises against systems, networks, and applications simulating real world environment. Perform network traffic analysis and threat detection using Wireshark and other offensive/defensive security tools. Architect and harden IT systems, virtualized environments, and network security devices in classified settings....
LMI
Sep 16, 2026
Full time
Chief Engineer
LMI Washington, DC
Overview LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.   Leveraging our mission-ready technology and solutions, proven  expertise  in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration,  LMI serves the defense, space, homeland, healthcare, and intelligence sectors—helping agencies navigate complexity and outpace change.  Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.   Responsibilities LMI is seeking an accomplished Chief Engineer to serve as the program's senior technical authority for...
SAIC
Jul 27, 2026
Senior Program Systems Integration Engineer
SAIC CA
Description JOB DESCRIPTION: SAIC is seeking a Principal Program Systems Integration Engineer to join our team in El Segundo, CA. Due to security requirements, work is required to be on-site in a secure facility. SAIC is sub-contractor on the Military Satellite Communications (MILSATCOM) Systems Engineering, Integration and Test (MSEIT) contract. The MSEIT effort provides leading edge SE&I for the Space Force's Space System Command. We support the Space Force's acquisition of state-of-the-art MILSATCOM systems, providing secure global, survivable, and protected communications for our nation's warfighters. We seek technical individuals who will thrive in a highly collaborative work environment of small teams, using the most modern tools and methodologies to tackle the challenges of integrating complex space and ground communications systems. You will join the Systems Integration team within the broader Systems Engineering team defining the next generation of space...
Lockheed Martin
Jun 12, 2026
Systems Engineer- SSTA
Lockheed Martin Sunnyvale, CA
Description: WHO WE ARE Lockheed Martin is a global leader in aerospace, defense, and technology solutions, dedicated to pushing the boundaries of innovation and shaping the future of the industry. With a rich legacy of excellence and a commitment to delivering advanced capabilities to our customers, we are proud to be at the forefront of cutting-edge technology and engineering. LM SPACE: WHAT WE'RE DOING Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. And we’re reimagining how space can connect us, ensuring security and prosperity. THE WORK Lockheed Martin’s SBIRS team is seeking a quick learning and highly skilled level 2 Systems Engineer - SE/SSTA in PCA work from our Sunnyvale, CA. location . Must have the ability to obtain a Secret...
SAIC
Mar 11, 2026
Information System Security Engineer
SAIC VA
Description SAIC is seeking an Information System Security Engineer (ISSE) to provide information security support. This position is in McLean, VA and requires an active TS/SCI clearance with Polygraph . This Customer's office is the force of choice for the development of global infrastructure and delivery of solutions that drive influence operations. If you have specialized skills in information security and tech ops, this is the role for you. Job responsibilities include, but are not limited to: Support the Lifecycle Assessment and Authorization (A&A) process. Develop a Systems Security Plan (SSP). Assist and maintain a formal Information Security Program that includes recommendations on continuous improvement of the processes and architectures. Maintain and make accessible documentation of all operational and business process activities in the form of Standard Operating Procedures (SOPs). Monitor and track projects in the A&A queue....
Lockheed Martin
Sep 14, 2026
Systems Engineer Stf
Lockheed Martin CO
Help Desk/Systems Engineer WHO WE ARE Lockheed Martin is a global security and aerospace company that employs approximately 120,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems, products, and services.  Lockheed Martin (LM) Rotary and Mission Systems (RMS) is looking for engineering professionals to work on the Trusted Security Solutions (TSS) program to engineer Cross-Domain Solution (CDS) products - creating innovative solutions to deliver resilient systems, products, and services to protect our customers' platforms against evolving cyber threats. WHAT WE’RE DOING This position is for a Systems Engineer/Help Desk Engineer on the Radiant Mercury (RM) product within the TSS program. RM is the US Navy's premier CDS product and LM has been the prime contractor for over 20 years.  RM delivers secure CDS to our customers, enabling the controlled transfer of information...
Lockheed Martin
Sep 14, 2026
Systems Engineer
Lockheed Martin CO
System Installer WHO WE ARE Lockheed Martin is a global security and aerospace company that employs approximately 120,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems, products, and services.  Lockheed Martin (LM) Rotary and Mission Systems (RMS) is looking for engineering professionals to work on the Trusted Security Solutions (TSS) program to engineer Cross-Domain Solution (CDS) products - creating innovative solutions to deliver resilient systems, products, and services to protect our customers' platforms against evolving cyber threats. WHAT WE’RE DOING This position is for a Systems Engineer/Installer on the Radiant Mercury (RM) product within the TSS program. RM is the US Navy's premier CDS product and LM has been the prime contractor for over 20 years.  RM delivers secure cross-domain solutions to our customers, enabling the controlled transfer of information...
Lockheed Martin
Sep 14, 2026
Systems Engineer
Lockheed Martin CO
System Installer WHO WE ARE Lockheed Martin is a global security and aerospace company that employs approximately 120,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems, products, and services.  Lockheed Martin (LM) Rotary and Mission Systems (RMS) is looking for engineering professionals to work on the Trusted Security Solutions (TSS) program to engineer Cross-Domain Solution (CDS) products - creating innovative solutions to deliver resilient systems, products, and services to protect our customers' platforms against evolving cyber threats. WHAT WE’RE DOING This position is for a Systems Engineer/Installer on the Radiant Mercury (RM) product within the TSS program. RM is the US Navy's premier CDS product and LM has been the prime contractor for over 20 years.  RM delivers secure cross-domain solutions to our customers, enabling the controlled transfer of information...
Lockheed Martin
Sep 14, 2026
Systems Engineer Stf.
Lockheed Martin CO
System Installer WHO WE ARE Lockheed Martin is a global security and aerospace company that employs approximately 120,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems, products, and services.  Lockheed Martin (LM) Rotary and Mission Systems (RMS) is looking for engineering professionals to work on the Trusted Security Solutions (TSS) program to engineer Cross-Domain Solution (CDS) products - creating innovative solutions to deliver resilient systems, products, and services to protect our customers' platforms against evolving cyber threats. WHAT WE’RE DOING This position is for a Systems Engineer/Installer on the Radiant Mercury (RM) product within the TSS program. RM is the US Navy's premier CDS product and LM has been the prime contractor for over 20 years.  RM delivers secure cross-domain solutions to our customers, enabling the controlled transfer of information...
Lockheed Martin
Aug 18, 2026
Electrical Engineer Sr - E3
Lockheed Martin CO
Standard Job Description Position details: Location: Littleton, CO Work Schedule: 9x80 Position type: Full-time onsite (this is not a hybrid position) Lockheed Martin Space is seeking a Senior Electrical Engineer to join our team in Littleton, CO! By joining the Lockheed Martin Space Radio Frequency (RF) Talent Center (RFTC) team, you will contribute our mission supporting challenging programs related to Space Vehicles, Hypersonics, Human Space Flight and Interplanetary Missions, Missile Defense, and more. As a Certified Principle Engineer (CPE), this role will have ownership for the success of a Digital Signal Payload. Responsibilities will include, but are not limited to; support vendor development, internal design evaluation, testing, analysis, integration, and initialization of the payload. Review and ensure compliance with vendor and program requirements, support payload troubleshooting, and lead cross functional engineering teams throughout the product...
Lockheed Martin
Jul 08, 2026
Principal Sensor Systems Architect - Radar
Lockheed Martin Moorestown, NJ
Description: What We’re Doing Here at Lockheed Martin Rotary and Mission Systems (RMS) we take on the most demanding challenges in the world. We seek out innovative ideas and creative solutions to seemingly impossible problems facing our customers in the Sensors, Effectors & Mission Systems (SEMS) organization. We collaborate with the best Radar engineers in the business across the Moorestown, NJ and Syracuse, NY sites to invent solutions where they don’t exist yet. If you’re looking for the challenge of a lifetime on a team of the brightest minds in the world, then Rotary Mission Systems and the Sensor Architectures team is the place for you. If you’re looking for life-long learning and a career where the hard work is the fun part, then you’re in the right place. Lockheed Martin. Your Mission is Ours. The Work In your role as a Principal Sensor Systems Architect, you will: • Provide guidance and leadership for program execution across sensor products. • Shape system...
Lockheed Martin
Jul 02, 2026
DevSecOps Engineer, Sr. - Embedded, Grand Prairie, TX
Lockheed Martin Grand Prairie, TX
Description: Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas. MFC is a recognized designer, developer and manufacturer of precision engagement aerospace and defense systems for the U.S. and allied militaries. MFC develops, manufactures and supports advanced products for military customers that include the U.S. Army, Navy, Air Force, Marine Corps, NASA and dozens of foreign allies. MFC also offers a wide range of products and services for the global civil nuclear power industry and the military’s green power initiatives. As a Senior Software Engineer at MFC, you will join one of the largest networks of software professionals, implementing cutting edge technologies...
Lockheed Martin
Jun 19, 2026
Cyber Systems Security Engineer (Embedded)
Lockheed Martin Grand Prairie, TX
Description: You will be a Cyber Systems Security Engineer in the Program Protection Organization. Our organization oversees all aspects of Anti-Tamper and embedded Cybersecurity across Missiles and Fire Control. We are chartered with providing the skills and innovative technologies to develop, design, produce and sustain secure products across our Lines of Business. What You Will Be Doing As the Cyber Systems Security Engineer you will be responsible for providing embedded System Security Engineering design and implementation in all aspects of System Security Engineering (SSE) process in development of Department of Defense (DoD) Weapon Systems. Your responsibilities will include: • Assessing and mitigating System Security threats/risks throughout the embedded Weapon System development life cycle • Validating System Security Engineering requirements decomposition, allocation and analysis for embedded Weapon Systems • Implementing System Security Engineering solutions...
General Dynamics Mission Systems, Inc
Jun 17, 2026
Senior Principal Contracts Specialist
General Dynamics Mission Systems, Inc Marion, VA
Basic Qualifications Bachelor's degree or equivalent combination of education and relevant experience is required plus a minimum of 10 years of relevant experience; or Master's degree plus a minimum of 8 years of relevant experience.   CLEARANCE REQUIREMENTS: Ability to obtain a Department of Defense SECRET security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position Overview: A Contracts Specialist is responsible for supporting the management of the company's contractual agreements with customers, in the drafting, negotiation, and execution of contracts, as well as ensuring compliance with contract terms and conditions. The Contracts Specialist also...
Lockheed Martin
Jun 09, 2026
Cyber Systems Security Engineer
Lockheed Martin King of Prussia, PA
Description: The coolest jobs on this planet … or any other … are with Lockheed Martin Space. At the dawn of a new space age, Lockheed Martin Space is a pioneer, partner, innovator, and builder. Our amazing people are on a mission to make a difference in the world. Every single day, we use our unique skills and experiences to craft, design, and build solutions to some of the world’s hardest engineering problems. Our culture inspires our employees to dream big; perform with excellence; and build incredible products. We provide the resources, the support, and the focus. You bring the passion and courage to envision limitless possibilities. Together, we’ll build a better tomorrow. Are you ready to further your career in Cyber Security by working for one of the top companies in the world? This position is for a Cyber Systems Security Engineer. The selected candidate will be part of a dynamic, team-oriented, and collaborative Cyber engineering team at the Valley Forge Campus...
Lockheed Martin
Jun 09, 2026
Cyber Systems Security Engineer
Lockheed Martin King of Prussia, PA
Description: The coolest jobs on this planet … or any other … are with Lockheed Martin Space. At the dawn of a new space age, Lockheed Martin Space is a pioneer, partner, innovator, and builder. Our amazing people are on a mission to make a difference in the world. Every single day, we use our unique skills and experiences to craft, design, and build solutions to some of the world’s hardest engineering problems. Our culture inspires our employees to dream big; perform with excellence; and build incredible products. We provide the resources, the support, and the focus. You bring the passion and courage to envision limitless possibilities. Together, we’ll build a better tomorrow. Are you ready to further your career in Cyber Security by working for one of the top companies in the world? This position is for a Cyber Systems Security Engineer. The selected candidate will be part of a dynamic, team-oriented, and collaborative Cyber engineering team at the Valley Forge Campus...
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